1# Build an image using the Dockerfile at current location (specified by '.' at the end) 2# Example: docker build -t [name] . 3docker build -t my_mongodb . To create a Dockerfile, see https://www.digitalocean.com/community/tutorials/docker-explained-using-dockerfiles-to-automate-building-of-images

1sudo apt-get remove python-openssl 2curl -o ./get-pip.py https://bootstrap.pypa.io/get-pip.py 3sudo python2 ./get-pip.py Replace with yum if in RH-based OS. See https://stackoverflow.com/questions/43267157/python-attributeerror-module-object-has-no-attribute-ssl-st-init for details.

http://docs.ansible.com/ansible/latest/playbooks_best_practices.html

It's in syslog. In ubuntu, do the following: 1grep -i ansible /var/log/syslog See details in https://serverfault.com/questions/531004/where-do-i-find-the-latest-ansible-error-log

https://serversforhackers.com/c/how-ansible-vault-works https://gist.github.com/tristanfisher/e5a306144a637dc739e7

Ensure "gather_facts" is NOT set to false and it should be fine.

You need to add a "marker" in order NOT to overwrite current content. For example usage, see github.com/promet/pstools.git and head over to promet-ansible branch & ansible-promet-apacheconfig/tasks/main.yml Syntax guide https://docs.ansible.com/ansible/latest/modules/blockinfile_module.html Some tutorial …

1ansible all -m setup

1ansible all -m setup -a "filter=ansible_distribution*" more in https://raymii.org/s/tutorials/Ansible_-_Only_if_on_specific_distribution_or_distribution_version.html

Have client create account in mailgun (with upgraded account by inputting credit card) Test email using test php sender Check in mailgun "Logs" More info in https://www.digitalocean.com/community/tutorials/how-to-set-up-a-mail-relay-with-postfix-and-mailgun-on-ubuntu-16-04